Elevator.



PATENTED MAY 16, 1905.

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0 ELEVATOR. APPIJUATION FILED APR. 28, 1903.

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LE COPY No' 790,137' BEST AVAILAB PA A. KARRBR.

ELBVATOR.

PPLIQATION FILED APB.. 28. 1903.

TBNTED MAY 15, 1905.

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BEST AVAILABLE COPY UNITED`-' STATES lidatented Ma y c,

PATENT OFFICE.,

ARMAND KARRER, OF ST. JOSEPH, MISSOURl, ASSIGNOR OF ONE-H.

TO ALFRED L. LOEVENSTEIN, OF ST. JOSEPH, MISSOURI.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. '790,137'1 dated May 16, 1905.

Application filed April 28, 1903. Serial No. 154,635.

To mil whom, t 17mg/ concern:

Be it known that 1', ARMAND KARRER, a citizen of the United States, and a resident of St. Joseph, in the county of Buchanan and State of Missouri. have invented a new and Improved Elevator, of which the following is a full, clear, and exact description.

This invention relates to an elevator in which the car is moved by means of screws or worms climbing on corresponding racks, by which arrangement it is practically impossible for the car to drop through the shaft upon the breakage ofk some part of the machinery.

The invention resides in certain novel features of construction and coaetive arrangement of parts, as will be hereinafter set forth.l

This specilication is an exact description of one example of my invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar characters oi' reference indii cate corresponding parts in all the views.

Figure 1 is a side elevation of the invention with the car in section and other parts broken away. Fig. 2 is a bottom plan view of the car. Fig. 3 is an enlarged detail of the screw or worm and the rack on which it works. Fig. 4 is an enlarged bottom plan of one of the brackets for the worms, said view showing in section the rack and the guide-rollers of said bracket; and Figs. 5 and G are detail views showing the manner of connecting` the sections of the rack.

The car 10 may he of any construction desired, and my improvements preferably are mounted on the bottom of the car.

11 indicates a reversible electrical motor suitably mounted under the car and having a pinion 12 on its shaft in mesh with a spur 14, fastened on a shaft 15, which lies horizontally under the bottom oi' the car and is held at its middle portion by an annular bearing 16 and at its ends by bearings 17, attached to the worm-brackets 18. These worm-brackets are bolted to the under side o'l the car and are suitably ribbed to insure the necessary ngth. Said brackets have bearings 19, in

shown in Fig. 2.

u which are mounted the journals 2O olSc worms or screwsA 21, said worms extenl vertically and being located one at each of the car, in the central plane ther'eelv; The worms 21 are conan`v ed by gears 22 with the ends of the shaft la and by this means said Worms are driven. v

At each side of the elevator-shaft veu cally-extending beams 23 are arranged, ai. to these beams are bolted or otherivisQ-L tened the racks, which aieibrmed on thei'.v inner edges with arc-.shaped teeth 24, con-` forming lto the worms 21, as indicated best in Fig. 3. Inward of said teeth the racks haw at each side longitudinally-extending gui( grooves 25, in which fit the antifriction-r; ers 26, carried by arms 27, projecting cui wardly from the brackets 18. This con .'uc tion not only allows the car to move freely in its vertical path, but prevents any lat-era movement and holds the worms properly en gaged with the racks. It is clear that tt( rotation of the worms against their respec tive racks will raise or lower the car, accord ing to the direction in which the worms au driven, and it will also be seen that it is im possible for the car to drop through the shai by reason of any o'dinav acci lent. The f can only drop when it ha:` been racked as to bring the worms with the racks, and this condition impossible in practice. The car is provided at its upper end with projecting arms 29, which carry gi.

30, running in the aforesaid groo same as the rollers 26, thus steady at its top, and attached to the up the car are cables 31, which pass ov 32 at the top of the shaft andV se!" counter-weights to assist in the upward ment of the car.

At each side of the shafl'fcomluits 3 arranged, these conduits carrying cond' 34 on which run the trolleys 35, tl one for each conductor and bein. arms or poles 3, pivoted on oi' the car and held in active ol springs 3T. (See the Fig. 1.)

BEST AVAILABLE COPY 'E8 in 1licates any suitable controller, and 39 e hand-lever and quad rant thereof, the hander being located within the car, as usual. lie electric current is taken to the elevator ianism by one of the trolleys and is ut therefrom through the other trolley its arm or pole. The conductors 34 should isulated within their respective conduits, s to prevent the dissipation of the elecal energy. r1e racks at the side of the shaft may be itructed in sections, if preferred, and these ions mortised into each other, as indiatedat'l() in Figs. 3, 5, and 6.

Various changes in the form, proportions, :id minor details of my invention may be rel)rted to at will without departing from the iirit and scope thereof. Hence I consider myilf entitled to all such variations as may lie l "ithin the intent of my claims.

Having thus described my invention, I claim s new and desire to secure by Letters Patent- 1. The combination with an elevator-shaft id the ear therein, of a motor mounted on the ar, two brackets attached to and projecting hun ward from the bottom of the car at opposite sidestlmrof, a shaft extending across the bottom of the car andv having its end portions mounted in the brackets, a vertical worm mounted in each bracket, gearing constng the shaft with the motor, gearing nnecting the ends of the shaft with the vertical worms, racks mounted at each side of the shaft and having teeth conforming to the threads of the worms, with which racks the worms are'in'f'mesh, the said racks having vertical grooves at each side thereof and the brackets having outwardly-projected arms lying at the sides of the racks, and devices carried by the arms and projected inwardlyAO to run in said grooves of the racks, for the purpose specified.

2. The combination with an elevator-shaft and the car therein, of a motor mounted on the car, two brackets attached thereto and projecting downward from the bottom of the car at opposite sides thereof, a shaft extending across the bottom of the car, bearings projecting downward from the lower extremities of the brackets, in which bearings the shaft is mounted, said shaft having conneetion\vith the motor, to be driven therefrom, vertical worms mounted respectively inthe brackets, bevel-gearing connecting the ends of the said shaft with said worms, racks mounted in the elevator-shaft and having the worms nieshed therewith, said racks having each a longitudinal groove therein, an arm projecting latf.- erally from each bracket alongside ofthe racks, and a member carried by each arm,

Y ARMAND KARRIER.

Witnesses:

W. A. LLOYD, A. A. THOMAN. 

